Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-06-2024 05:33

General

  • Target

    a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.exe

  • Size

    4.6MB

  • MD5

    4173debbc3d407dca3905c212ab537f2

  • SHA1

    807cd0f7e7337545ecde2a1dec4fd9ad6b31ad7a

  • SHA256

    a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693

  • SHA512

    884581348592d891c95e916481d5e2b2fe1aeef7fd55b25acf2010bf542c7f3e6f15e7be6ec1f2813e9a4dc0cbc853c9c0beca2c13b0d6bc5d1e8a2a6827d57d

  • SSDEEP

    98304:mTMDgLaCF/V6GoPhbZQ0sdYJi4LXyrk/BAqZ0pyrXFtbrKeDYSLdCu9zlp:kMDEaG/V6PPhb5sGJDLCrkCXSFlrKUYy

Malware Config

Extracted

Family

socks5systemz

C2

bubkvdl.com

http://bubkvdl.com/search/?q=67e28dd83a5da32a155afd1b7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a271ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff818c1ee969b39

Signatures

  • Detect Socks5Systemz Payload 1 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.exe
    "C:\Users\Admin\AppData\Local\Temp\a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:380
    • C:\Users\Admin\AppData\Local\Temp\is-9FUP1.tmp\a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-9FUP1.tmp\a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.tmp" /SL5="$600EA,4585671,54272,C:\Users\Admin\AppData\Local\Temp\a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4044
      • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
        "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -i
        3⤵
        • Executes dropped EXE
        PID:3688
      • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
        "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4560
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3804 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4960

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\is-43TOO.tmp\_isetup\_iscrypt.dll
      Filesize

      2KB

      MD5

      a69559718ab506675e907fe49deb71e9

      SHA1

      bc8f404ffdb1960b50c12ff9413c893b56f2e36f

      SHA256

      2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

      SHA512

      e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

    • C:\Users\Admin\AppData\Local\Temp\is-9FUP1.tmp\a408e2bfa6521362525065c4170d314d83ffddc4ed68514ac01999e61a1dd693.tmp
      Filesize

      680KB

      MD5

      53a94211658a6bbf3d3a695470f940a6

      SHA1

      a9909ddfc97dee691e9d60b1257d61a3c1ef4e07

      SHA256

      d4928c3cacf826943bb44385aac5fb52e6ac69054f31a463df266baf9aa26d01

      SHA512

      d9c916961abcce8f05089df9cb6310c930aaa29266bfaf378a4dd0c9180ba9186a81393c662ba2a3b1a4da587379d68d532250c1a8d216d44dd532aaf178b402

    • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
      Filesize

      2.6MB

      MD5

      a0ac562bedc60906db18a7457c4a3e33

      SHA1

      f9e83a91e0c8609a355bafa25c88a0ae30107fed

      SHA256

      728d3595972daf3b92bd052193a13a079d0862604c6a88fb3acd739cf08ec38a

      SHA512

      ccaa43278a250cc6ce03d04344ebd57e928d99e93b83a938eeba65c25a7255de5cadd51bc4d593214a2232c214a47a7c1a0e0ca56cb398e0d74c886470650414

    • memory/380-2-0x0000000000401000-0x000000000040B000-memory.dmp
      Filesize

      40KB

    • memory/380-7-0x0000000000400000-0x0000000000414000-memory.dmp
      Filesize

      80KB

    • memory/380-0-0x0000000000400000-0x0000000000414000-memory.dmp
      Filesize

      80KB

    • memory/380-70-0x0000000000400000-0x0000000000414000-memory.dmp
      Filesize

      80KB

    • memory/3688-66-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/3688-61-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/3688-62-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/3688-63-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4044-71-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4044-8-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4044-57-0x0000000000400000-0x00000000004BA000-memory.dmp
      Filesize

      744KB

    • memory/4560-85-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-73-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-76-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-77-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-80-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-82-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-69-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-89-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-90-0x00000000009C0000-0x0000000000A62000-memory.dmp
      Filesize

      648KB

    • memory/4560-95-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-98-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-100-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-103-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-106-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-108-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB

    • memory/4560-111-0x0000000000400000-0x00000000006A4000-memory.dmp
      Filesize

      2.6MB